This is the 2.6 GB 5.25-inch Magneto Optical Internal Drive with Direct Overwrite Recording, Integration Model. ??Its main features are: 2.6 GB Capacity ISO Compliant Drive; Direct Overwrite Recording Provides up to Double the Writing Speed; Fast 4 MB/s Sustained Data Transfer Rate; 4 MB Buffer Memory with S-Cache Algorithm for Improved Data Throughput; Low Power Consumption for Easy Integration into Desktop Systems.